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  4. Ionic strength of 0.2 M Na 3 PO 4 is

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Q. Ionic strength of $0.2\, M \,Na _3 PO _4$ is

Electrochemistry

Solution:

${\left[ Na ^{\oplus}\right]=0.6 \,M \left[ PO _4^{3-}\right]=0.2 }$
$\mu=\frac{1}{2}\left[0.6(1)^2+0.2(3)^2\right]=1.2$

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